Issue #20311: select.epoll.poll() now rounds the timeout away from zero,
instead of rounding towards zero. For example, a timeout of one microsecond is
now rounded to one millisecond, instead of being rounded to zero.
diff --git a/Lib/test/test_epoll.py b/Lib/test/test_epoll.py
index 7f9547f..ad545d3 100644
--- a/Lib/test/test_epoll.py
+++ b/Lib/test/test_epoll.py
@@ -46,6 +46,17 @@
self.serverSocket.listen(1)
self.connections = [self.serverSocket]
+ def test_timeout_rounding(self):
+ # epoll_wait() has a resolution of 1 millisecond, check if the timeout
+ # is correctly rounded to the upper bound
+ epoll = select.epoll()
+ self.addCleanup(epoll.close)
+ for timeout in (1e-2, 1e-3, 1e-4):
+ t0 = time.perf_counter()
+ epoll.poll(timeout)
+ dt = time.perf_counter() - t0
+ self.assertGreaterEqual(dt, timeout)
+
def tearDown(self):
for skt in self.connections: